Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2024 12 14.  Predictions up to the next  14.0 days:

     Date     Time(NOAA-21) NOAA-21 Lat/Lon Date Time(LANDSAT-9) LANDSAT-9 Lat/Lon    Distance(km)  Time Diff(sec)
 12/15/2024   21:22:27   (  70.80,-145.12) 12/15/2024   21:23:36  (  70.65,-143.65)   56.41                69
 12/15/2024   22:12:59   ( -70.16,  23.21) 12/15/2024   22:13:13  ( -70.16,  23.25)    1.68                14
 12/15/2024   23:03:42   (  70.02,-169.26) 12/15/2024   23:02:41  (  70.00,-169.32)    3.24                61
 12/18/2024   13:39:08   (  70.23, -28.43) 12/18/2024   13:40:14  (  70.21, -28.43)    2.49                66
 12/18/2024   14:29:50   ( -70.11, 139.06) 12/18/2024   14:29:44  ( -70.10, 139.05)    1.92                 6
 12/18/2024   15:20:27   (  69.66, -52.94) 12/18/2024   15:19:16  (  69.72, -53.84)   35.28                71
 12/21/2024   05:55:59   (  70.20,  87.40) 12/21/2024   05:56:43  (  70.21,  87.46)    3.07                44
 12/21/2024   06:46:41   ( -70.08,-105.10) 12/21/2024   06:46:14  ( -70.05,-105.14)    3.17                27
 12/23/2024   22:12:49   (  70.12,-156.70) 12/23/2024   22:13:13  (  70.13,-156.78)    3.06                24
 12/23/2024   23:03:32   ( -70.06,  10.71) 12/23/2024   23:02:42  ( -70.08,  10.78)    3.47                50
 12/26/2024   13:38:59   ( -70.40, 151.33) 12/26/2024   13:40:11  ( -70.33, 151.76)   17.64                72
 12/26/2024   14:29:39   (  70.11, -40.90) 12/26/2024   14:29:40  (  70.11, -40.92)    0.83                 1
 12/26/2024   15:20:21   ( -69.99, 126.59) 12/26/2024   15:19:10  ( -70.00, 126.57)    1.70                71